Ceramic Nonstick Coating
Sol-gel ceramic coating · Thermolon (GreenPan) · Silica-based nonstick
What it is
A silica-based (SiO₂) inorganic nonstick coating applied via a sol-gel process. The primary matrix is formed by condensation of colloidal silica and organoalkoxysilane compounds (typically methyltrimethoxysilane) that are thermally cured into a durable inorganic polymer. Free of PTFE and marketed as PFAS-free.
In this product: PFAS-free nonstick coating, a silica-based alternative to PTFE for nonstick cookware surfaces.
Dose & route, what actually matters
Minimal, the silica matrix is chemically inert and does not meaningfully migrate into food at cooking temperatures. No PTFE-equivalent fume risk. Note: independent testing (Lead Safe Mama, 2020–2021) detected titanium dioxide (TiO₂) nanoparticles in GreenPan and other ceramic-coated brands, indicating TiO₂ may be added as a pigment/filler; full coating compositions are not publicly disclosed by manufacturers.
EUROPEAN UNION
No specific EU restriction on sol-gel ceramic coatings in cookware. No PFAS concerns associated with ceramic sol-gel coatings under the REACH universal PFAS restriction proposal, which is specific to PFAS-class compounds.
UNITED STATES
No FDA restriction or safety concern for food-contact ceramic (sol-gel silica) coatings. GreenPan and similar brands market these as PFAS-free and certified by third parties.
The evidence
I Read Labels For You (2023) analysis of ceramic cookware: GreenPan’s Thermolon coating ‘mainly consists of silica (aka sand)’ per brand claims; no PTFE, no PFAS. Durability (not toxicity) is the primary limitation: ceramic nonstick coatings wear faster than PTFE.
review · 2023 · source
EHN investigative report (2023): Independent testing found high levels of titanium dioxide (TiO₂) nanoparticles in GreenPan, Always Pan, and Caraway ceramic cookware, indicating TiO₂ is likely added as a pigment or filler in some sol-gel formulations, even though not disclosed.
review · 2023 · source
California Prop 65: Not listed on California Prop 65.
How to avoid it
No need to avoid ceramic-coated cookware on toxicity grounds. Treat it gently, avoid metal utensils and high heat, to extend coating life. When it wears out, replace with cast iron or carbon steel for maximum longevity.
Where it hides
Editorial analysis of publicly available regulatory and peer-reviewed sources. Not medical advice. We name our evidence and link it, including when an ingredient is fine.